The Earth Radiation Budget Satellite (ERBS) was a NASA scientific research satellite launched on October 5, 1984 to study the Earth's radiation budget and stratospheric aerosol and gases. It was carried into low earth orbit and deployed by the Space Shuttle Challenger, during the STS-41-G mission. The spacecraft was expected to have a two-year operation life, but ultimately, the mission provided scientific data about the Earth's ozone layer for more than two decades. In addition, it carried the Stratospheric Aerosol Gas Experiment (SAGE II).